Denyo Co., Ltd., together with its subsidiaries, engages in the developing, manufacturing, and selling of engine-driven generators, welders, and air compressors in Japan, the United States, rest of Asia, and Europe. The company offers soundless, industrial, rental, portable, caravan, residence, telecom, and ultra-silence generators; gasoline and diesel welding machines; and box type, trailer type, high pressure type, after cooler type, and dry air type air compressors. It also manufactures, sells, services, leases, and rents industrial electrical machinery and parts. The company was formerly known as Japan Power Welding Machine Co., Ltd. and changed its name to Denyo Co., Ltd. in July 1966. The company was incorporated in 1948 and is headquartered in Tokyo, Japan.